chore: update SDK version to v2.13.0

Author: seymourtang

src/agora_agent/core/client_wrapper.py

@@ -26,10 +26,10 @@ def __init__(
 
     def get_headers(self) -> typing.Dict[str, str]:
         headers: typing.Dict[str, str] = {
-            "User-Agent": "agora-agents/v2.12.0",
+            "User-Agent": "agora-agents/v2.13.0",
             "X-Fern-Language": "Python",
             "X-Fern-SDK-Name": "agora-agents",
-            "X-Fern-SDK-Version": "v2.12.0",
+            "X-Fern-SDK-Version": "v2.13.0",
             **(self.get_custom_headers() or {}),
         }
         headers["Authorization"] = httpx.BasicAuth(self._get_username(), self._get_password())._auth_header